quad bike vs wagon

quad bike

noun
  • A small off-road four-wheeled powered vehicle, especially of a design derived from a motorcycle, usually used for recreation or farm work. 

wagon

noun
  • A heavier four-wheeled (normally horse-drawn) vehicle designed to carry goods (or sometimes people). 

  • A vehicle (wagon) designed to transport goods or people on railway. 

  • A kind of prefix used in de Bruijn notation. 

  • Buttocks. 

verb
  • To load into a wagon in preparation for transportation; to transport by means of a wagon. 

  • To travel in a wagon. 

How often have the words quad bike and wagon occurred in a corpus of books? (source: Google Ngram Viewer )